CKI_REW_ML is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "IR values GR/IR total -IRVal-" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_CKI_REW_ML TYPE CKI_REW_ML.
The CKI_REW_ML table consists of various fields, each holding specific information or linking keys about IR values GR/IR total -IRVal- data available in SAP. These include REWRT_2 (Total invoice receipt value of period), REWRT_3 (Total invoice receipt value of period)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .